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05 August 2013 : Case report  USA

Mediastinal mass and pericardial tamponade in a renal transplant recipient: A rare case of nocardia infection

Challenging differential diagnosis, Management of emergency care, Rare disease, Educational Purpose (only if useful for a systematic review or synthesis)

Maria Nieva SalazarEF, Dannah WrayE, Chadrick DenlingerE, Titte SrinivasE, Beje ThomasE, Maria Aurora PosadasE

DOI: 10.12659/AJCR.889383

Am J Case Rep 2013; 14:295-299

Abstract

Background: Nocardia infections can complicate solid organ transplantation. The usual clinical presentations include pulmonary infiltrates with or without cavitation and subcutaneous and brain abscesses. We report an unusual case of nocardia infection in a kidney transplant recipient that presented as mediastinal mass and was associated with pericardial tamponade.
Case Report: A 30 year old African American renal transplant recipient presented with cough, hoarseness and shortness of breath nine months after kidney transplantation. She received basiliximab perioperatively and her maintenance immunosuppression included tacrolimus, mycophenolate mofetil and prednisone. Computed tomography (CT) showed a large mediastinal mass with a large pericardial effusion. An echocardiogram revealed collapse of the right ventricle consistent with tamponade. We performed emergent pericardiocentesis to treat the tamponade. A mediastinoscopic biopsy of the mediastinal mass was done to establish a diagnosis. The mediastinal biopsy confirmed the growth of Nocardia. After 2 weeks of imipenem and 6 weeks of linezolid, there was marked radiographic improvement in the size of the mediastinal mass.
Conclusions: We report a rare case of a large mediastinal mass associated with pericardial tamponade from nocardia infection in a renal transplant recipient. An invasive approach may be necessary to obtain tissue diagnosis to direct treatment in these cases. Prompt and appropriate medical therapy leads to marked radiographic improvement.

Keywords: pericardial tamponade, mediastinal mass, Nocardia, Kidney Transplantation

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American Journal of Case Reports eISSN: 1941-5923
American Journal of Case Reports eISSN: 1941-5923